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∙ 11y ago
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Would cysteine test positive in a biuret test?
no! no change in colour confirms presence of cysteine
Caseine in biuret test?
Casein form a purple compound in the biuret test.
What is the function of alkaline solution in Biuret's test?
Alkaline levels are essential for the solution to change colour. Without alkaline levels, the colour of the solution would not be detectable.
Would albumin give a positive biuret test?
Hey. okay.. the biuret test is a test for peptide bonds. when CuSO4 is added to KOH, an alkaline solution, nitrogen atoms from the peptide bond forms a purple compound with the Cu2+ ions. hope this helps! read it in a text book.
Does phenol give a positive biuret test?
No. The Biuret test only gives a positive result if a peptide bond exists. Phenol doesn't have a peptide bond, so it will not give a positive test.
Would cysteine test positive in a biuret test?
no! no change in colour confirms presence of cysteine
How amylase breakdown starch?
To test starch: To test starch you take the food sample, and add iodine solution if the colour turns black this means starch is present. To test for protein: To test for protein, you take the food sample and add Biuret A and Biuret B and shake, if the colour turns lilac this means that protein is present.
How do you tell if a substance contains protein by using biuret test?
If Biuret Reagent is related to the presence of Protein macromolecules, then a positive result will change it's colour from blue to violet.
Caseine in biuret test?
Casein form a purple compound in the biuret test.
What is used to test for the presence of proteins?
non
What is the function of alkaline solution in Biuret's test?
Alkaline levels are essential for the solution to change colour. Without alkaline levels, the colour of the solution would not be detectable.
Is biuret test suitable to test the presence of proteins in the urine?
Yes, the biuret test will indicate the presence of peptides. If it turns violet, it is a positive result.
What is the name of the test for proteins?
The biuret test
Does pepsin test positive in biuret test?
No
How many of these chemical groupings must be present in a molecule to give a positive biuret test?
you should have at least 2 of these,to obtain a positive result in Biuret's test. because biuret test is a test used to detect if there is peptide linkages.
What test would you run to test for the presence of a polypeptide?
Biuret test
What might Biuret reagent test in a practical real life situation?
Biuret reagent test in a practical situation tests for lipids. Biuret is used in food agents for protein amino acid chains.
